So instead of being ahead of the curve, hubspot would rather wait until there is a demand and then rush to produce it. Windows phones are on the rise as more people realize they can do way more than an iphone.

Hello Dana:
Thank you for your interest in HubSpot's mobile apps. At this time, there are no concrete plans to build a Windows Phone app. Windows phone adoption appears especially low amongst the HubSpot customer base. However, we will wait for a few more months to see if something changes adoption-wise and would be open to revising our decision based on the data and customer feedback.